The history-making tennis star talks to Refinery29 about the Battle of the Sexes film and what it means to make history.

Billie Jean King, who was born in California in 1943, won 39 Grand Slam titles before she retired in 1983. In a memoir, she recounts her fight for better pay and recognition as a leading tennis player.

Billie Jean King (USA) - 1978 US Open Mixed Doubles, early rounds. Photographer: June Harrison

Fifty years after signing one of the most lucrative—and consequential—contract in sports, Billie Jean King is still fighting for more.

Tennis legend Billie Jean King, who is played by Emma Stone in the new movie "Battle of the Sexes," talks about the film, LGBTQ rights and being outed.

March 8 is International Women's Day (US has its equivalent on the 26th of August) which celebrates the struggle for women's rights. Throughout history, many strong women had to rise against the odds and fight for their dreams and passions, equality and solidarity among men. Their bravery contributed to shaping today's world, and has to be remembered.

Fifty years ago, Billie Jean King faced Bobby Riggs in a tennis match that held importance for King and generations of female athletes that followed.

Billie Jean King, 1976.

And she stays winning.

Chris Evert and Billie Jean King in 1971